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Finding the Fourth Proportional to 680,781.36, 939,477.96 and 379,046.64

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Solution

The fourth proportional to 680,781.36, 939,477.96 and 379,046.64 is: 523,084.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,781.36 : 939,477.96 = 379,046.64 : x
  2. Step 2: Convert to fraction form
    680,781.36/939,477.96 = 379,046.64/x
  3. Step 3: Cross multiply
    680,781.36x = 939,477.96 × 379,046.64
  4. Step 4: Simplify right side
    680,781.36x = 356,105,964,092.05
  5. Step 5: Solve for x
    x = 356,105,964,092.05/680,781.36
  6. Step 6: Final answer
    x = 523,084.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.